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Understory vegetation plays the key role in sustaining soil microbial biomass and extracellular enzyme activities

文献类型：期刊论文

作者Yang, Yang3,4,5; Zhang, Xinyu4,5; Zhang, Chuang2; Wang, Huimin4,5; Fu, Xiaoli4,5; Chen, Fusheng1; Wan, Songze1; Sun, Xiaomin4,5; Wen, Xuefa4,5; Wang, Jifu3
刊名BIOGEOSCIENCES
出版日期2018-07-24
卷号15期号:14页码:4481-4494
ISSN号1726-4170
DOI10.5194/bg-15-4481-2018
通讯作者Zhang, Xinyu(zhangxy@igsnrr.ac.cn) ; Wang, Jifu(13946004918@163.com)
英文摘要While we know that understory vegetation affects the soil microbial biomass and extracellular enzyme activities in subtropical Chinese fir (Cunninghamia lanceolata) forests, we are less certain about the degree of its influence. We determined the degree to which the soil abiotic and biotic properties, such as PLFAs and extracellular enzyme activities, were controlled by understory vegetation. We established a paired treatment in a subtropical Chinese fir plantation, which comprised one plot from which the understory vegetation and litter were removed (None) and another from which the litter was removed but the understory vegetation was left intact (Understory). We evaluated how the understory vegetation influenced the soil abiotic properties, the bacterial, fungal, and actinobacterial PLFAs, and the activities of five hydrolases and two oxidative enzymes. The dissolved organic carbon (DOC), particulate organic carbon, soil organic carbon, ammonia nitrogen (NH4+-N), and total nitrogen contents and soil moisture were 18 %, 25 %, 12 %, 34 %, 8 %, and 4% lower in the None treatments than in the Understory treatments, respectively (P < 0.05). Soil bacterial, fungal, and total PLFAs, and the potential activities of beta-1,4-glucosidase (beta G), beta-1,4-N-acetylglucosaminidase, phenol oxidase, and peroxidase, were as much as 24% lower in None treatments than in Understory treatments (P < 0.05). The specific activities of C-acquiring enzymes were as much as 41% higher (P < 0.05), and the ratio of C- to N-acquiring enzymes was also higher in the None treatments than in the Understory treatments. This suggests that in the absence of understory vegetation microbes invested more in C acquisition than N acquisition because the carbon (C) inputs were less labile. The negative relationship between DOC and AP shows that DOC is consumed when P-acquiring enzymes are produced. The positive correlation between NH4+-N and beta G suggested the increased availability of N promoted the decomposition of C. More extracellular enzymes that degrade soil organic matter are produced when there is understory vegetation, which leads to losses of soil C. On the other hand, the soil C sink is maintained by increased inputs of C. We can therefore conclude that understory vegetation contributes to C sequestration in Chinese fir forests and suggest that understory should be maintained to sustain soil quality in subtropical Chinese fir plantations.
WOS关键词SUBSTRATE UTILIZATION PATTERNS ; GROUND CARBON ALLOCATION ; ORGANIC-CARBON ; EUCALYPTUS PLANTATIONS ; FOREST SOIL ; COMMUNITY COMPOSITION ; MYCORRHIZAL FUNGI ; SUBTROPICAL CHINA ; DECIDUOUS FOREST ; LAND-USE
资助项目National Natural Science Foundation of China[41571251] ; National Natural Science Foundation of China[41571130043]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
WOS记录号WOS:000439584700001
出版者COPERNICUS GESELLSCHAFT MBH
资助机构National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/130001]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Xinyu; Wang, Jifu
作者单位1.Jiangxi Agr Univ, Coll Forestry, Nanchang 330045, Jiangxi, Peoples R China
2.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, 286 Huaizhong Rd, Shijiazhuang 050021, Hebei, Peoples R China
3.Harbin Normal Univ, Coll Geog Sci, Harbin 150025, Heilongjiang, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Yang,Zhang, Xinyu,Zhang, Chuang,et al. Understory vegetation plays the key role in sustaining soil microbial biomass and extracellular enzyme activities[J]. BIOGEOSCIENCES,2018,15(14):4481-4494.
APA Yang, Yang.,Zhang, Xinyu.,Zhang, Chuang.,Wang, Huimin.,Fu, Xiaoli.,...&Wang, Jifu.(2018).Understory vegetation plays the key role in sustaining soil microbial biomass and extracellular enzyme activities.BIOGEOSCIENCES,15(14),4481-4494.
MLA Yang, Yang,et al."Understory vegetation plays the key role in sustaining soil microbial biomass and extracellular enzyme activities".BIOGEOSCIENCES 15.14(2018):4481-4494.

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来源：地理科学与资源研究所

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